<script setup>
import OrderHeader from '@/components/OrderHeader.vue'
import NavFooter from '@/components/NavFooter.vue'
import ServiceBar from '@/components/ServiceBar.vue'
import { onMounted, getCurrentInstance, ref, toRef } from 'vue'
import { useRouter } from 'vue-router'

const prefix = import.meta.env.VITE_BASE_URL
const { proxy } = getCurrentInstance()
const router = useRouter()
const list = ref([])  // 商品列表
const allChecked = ref(false)   // 是否全选
const cartTotalPrice = ref(0)   // 商品总金额
const checkedNum = ref(0)   // 选中商品数量
onMounted(() => getCartList())
// 公共赋值
const renderData = (res) => {
  list.value = res.cartProductVoList || []
  allChecked.value = res.selectedAll
  cartTotalPrice.value = res.cartProductVoList.reduce((prev, cur) => prev + cur.productTotalPrice, 0)
  checkedNum.value = list.value.filter(item => item.productSelected).length
}
// 获取购物车列表
const getCartList = () => {
  proxy.axios.get('/carts').then(res => {
    renderData(res)
  })
}
// 控制全选功能
const toggleAll = () => {
  let url = allChecked.value ? '/carts/unSelectAll' : '/carts/selectAll'
  allChecked.value = true
  proxy.axios.put(url).then(res => {
    renderData(res)
  })
}
// 更新购物车数量和购物车单选状态
const updateCart = (item, type) => {
  let lis = list.value.filter(t => t === item)[0]
  let quantity = lis.quantity
  let selected = lis.productSelected
  if (type === '-') {
    if (quantity === 1) {
      proxy.$message.warning('商品至少保留一件')
      return
    }
    --list.value.filter(t => t === item)[0].quantity
  } else if (type === '+') {
    if (quantity > item.productStock) {
      proxy.$message.warning('购买数量不能超过库存数量')
      return
    }
    ++list.value.filter(t => t === item)[0].quantity
  } else {
    selected = !item.productSelected
  }
  proxy.axios.put(`/carts/10`, {
    quantity,
    selected
  }).then(res => {
    // renderData(res)
  })
}
// 删除购物车商品
const delProduct = () => {
  proxy.$message.success('删除成功')
  proxy.axios.delete(`/carts/10`).then(res => {
    renderData(res)
  })
}
// 购物车下单
const order = () => {
  let isCheck = list.value.every(item => !item.productSelected)
  if (isCheck) {
    proxy.$message.warning('请选择一件商品')
  } else {
    router.push({
      name: 'order-confirm'
    })
  }
}
</script>

<template>
  <div class="cart">
    <order-header title="我的购物车">
      <template #tip>
        <span>温馨提示：产品是否购买成功，以最终下单为准哦，请尽快结算</span>
      </template>
    </order-header>
    <div class="wrapper">
      <div class="container">
        <div class="cart-box">
          <ul class="cart-item-head">
            <li class="col-1"><span class="checkbox" :class="{ 'checked': allChecked }" @click="toggleAll"></span>全选
            </li>
            <li class="col-3">商品名称</li>
            <li class="col-1">单价</li>
            <li class="col-2">数量</li>
            <li class="col-1">小计</li>
            <li class="col-1">操作</li>
          </ul>
          <ul class="cart-item-list">
            <li class="cart-item" v-for="(item, index) in list" :key="index">
              <div class="item-check">
                <span class="checkbox" :class="{ 'checked': item.productSelected }" @click="updateCart(item)"></span>
              </div>
              <div class="item-name">
                <img v-lazy="prefix + item.productMainImage" alt="">
                <span>{{ item.productName + ' , ' + item.productSubtitle }}</span>
              </div>
              <div class="item-price">{{ item.productPrice.toFixed(2) + '元' }}</div>
              <div class="item-num">
                <div class="num-box">
                  <a href="javascript:;" @click="updateCart(item, '-')">-</a>
                  <span>{{ item.quantity }}</span>
                  <a href="javascript:;" @click="updateCart(item, '+')">+</a>
                </div>
              </div>
              <div class="item-total">{{ item.productTotalPrice.toFixed(2) + '元' }}</div>
              <div class="item-del" @click="delProduct(item)"></div>
            </li>
          </ul>
        </div>
        <div class="order-wrap clearfix">
          <div class="cart-tip fl">
            <a href="/">继续购物</a>
            共<span>{{ list.length }}</span>件商品，已选择<span>{{ checkedNum }}</span>件
          </div>
          <div class="total fr">
            合计：<span>{{ cartTotalPrice.toFixed(2) }}</span>元
            <a href="javascript:;" class="btn" @click="order">去结算</a>
          </div>
        </div>
      </div>
    </div>
    <service-bar></service-bar>
    <nav-footer></nav-footer>
  </div>
</template>

<style lang="scss">
.cart {
  .wrapper {
    background-color: #F5F5F5;
    padding-top: 30px;
    padding-bottom: 114px;

    .cart-box {
      background-color: #fff;
      font-size: 14px;
      color: #999999;
      text-align: center;

      .checkbox {
        display: inline-block;
        width: 22px;
        height: 22px;
        border: 1px solid #E5E5E5;
        vertical-align: middle;
        margin-right: 17px;
        cursor: pointer;

        &.checked {
          background: url('/imgs/icon-gou.png') #FF6600 no-repeat center;
          background-size: 16px 12px;
          border: none;
        }
      }

      .cart-item-head {
        display: flex;
        height: 79px;
        line-height: 79px;

        .col-1 {
          flex: 1;
        }

        .col-2 {
          flex: 2;
        }

        .col-3 {
          flex: 3;
        }
      }

      .cart-item-list {
        .cart-item {
          display: flex;
          align-items: center;
          height: 125px;
          border-top: 1px solid #E5E5E5;
          font-size: 16px;

          .item-check {
            flex: 1;
          }

          .item-name {
            flex: 3;
            font-size: 18px;
            color: #333333;
            display: flex;
            align-items: center;

            img {
              width: 80px;
              height: 80px;
              vertical-align: middle;
            }

            span {
              margin-left: 30px;
            }
          }

          .item-price {
            flex: 1;
            color: #333333;
          }

          .item-num {
            flex: 2;

            .num-box {
              display: inline-block;
              width: 150px;
              height: 40px;
              line-height: 40px;
              border: 1px solid #E5E5E5;
              font-size: 14px;

              a {
                display: inline-block;
                width: 50px;
                color: #333333;
              }

              span {
                display: inline-block;
                width: 50px;
                color: #333333;
              }
            }
          }

          .item-total {
            flex: 1;
            color: #FF6600;
          }

          .item-del {
            flex: 1;
            width: 14px;
            height: 12px;
            background: url('/imgs/icon-close.png') no-repeat center;
            background-size: contain;
            cursor: pointer;
          }
        }
      }
    }

    .order-wrap {
      font-size: 14px;
      color: #666666;
      margin-top: 20px;
      height: 50px;
      line-height: 50px;

      .cart-tip {
        margin-left: 29px;

        a {
          color: #666666;
          margin-right: 37px;
        }

        span {
          color: #FF6600;
          margin: 0 5px;
        }
      }

      .total {
        font-size: 14px;
        color: #FF6600;

        span {
          font-size: 24px;
        }

        a {
          width: 202px;
          height: 50px;
          line-height: 50px;
          font-size: 18px;
          margin-left: 37px;
        }
      }
    }
  }
}
</style>
